1001101220001 has 12 divisors (see below), whose sum is σ = 1499591951312. Its totient is φ = 667400813172.

The previous prime is 1001101219961. The next prime is 1001101220029. The reversal of 1001101220001 is 1000221011001.

It is a happy number.

It is not a de Polignac number, because 1001101220001 - 2⁷ = 1001101219873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001101227001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2059878811 + ... + 2059879296.

Almost surely, 2^{1001101220001} is an apocalyptic number.

It is an amenable number.

1001101220001 is a deficient number, since it is larger than the sum of its proper divisors (498490731311).

1001101220001 is an frugal number, since it uses more digits than its factorization.

1001101220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119758122 (or 4119758110 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1001101220001 its reverse (1000221011001), we get a palindrome (2001322231002).

The spelling of 1001101220001 in words is "one trillion, one billion, one hundred one million, two hundred twenty thousand, one".